@Robert375
It sounds like specifically your house rental. I haven't had snuck appliances but doesn't mean people don't do it just lucky haha. I would suggest especially if more than 1 time I have things in my rules but I will mention again while vetting. If you know they are moving I always blame someone else haha.
In case of any inconveniencia to you my insurer (they don't know if you have an insurer) for liability reasons doesn't allow ant undeclared furniture or appliances.
I would suggest you also review your pricing again.Sometimes pricing too low attracts renters that are on a tight budget, Storage rental for a month isn't an outrageous expense.